golden colour dimes

hello and good day, i have found in unc mixed rolls of roosie's 2 "gold" toned coins, are hese just environmental (toning) damage, or can they be a test strike on different metal, a regular dime is shown for comparison , the 2017p has it very much so, the 2013, not so much, looks more like toning, but the 2017 looks unnatural to say the least

 

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Are you British?

 

Where did you get these from?

 

Gold is a normal color for these to tone. It's caused by how and where they are stored.

 

no, native of america..yonkers, ny usa was me birthplace..

 

ebay lot of mixed unc roosevelt dimes in a plastic tube ..

 

ok, thanks, is there a listing of what years DID have experiments for our c=coinage in alternate metals, i have seen a few pcgs slabs stating such and many for sale in error magazines as well, mostly quarters though

 

Normal toning